Cipher Post

Crack every secret letter

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Cipher Post is a classic cryptogram puzzle game set inside a vintage post office, where every letter arrives encrypted and waiting to be decoded. Each puzzle uses a real substitution cipher: every alphabet letter has been swapped for another. Tap a cipher letter, choose its true letter on the keyboard, and reveal the message step by step as words begin to make sense. Use helpful codebreaker tools such as frequency bars, one-letter word clues, and repeated word patterns to solve difficult dispatches without guessing. Play at your own pace in Relaxed mode, or try Challenge mode with a mistake counter for a sharper test. Solve 112 handcrafted cryptograms across 8 themed packs, including proverbs, expedition telegrams, love letters, detective notes, sea post, and more. A fresh Daily Cipher offers streak tracking, while stars, achievements, statistics, and unlockable packs give you long-term goals. The illustrated Decoder’s Manual teaches classic solving strategies, and the whole game works offline with no account required. Built with aged parchment, brass details, wax seals, and a quiet vintage atmosphere, Cipher Post turns every encrypted letter into a small logic mystery.

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Added the new subtitle: “Crack every secret letter” to better reflect the game’s cryptogram experience. Added new language localisations and improved translations across supported regions. Fixed minor bugs, improved performance, and enhanced overall stability and gameplay experience.

Version 1.1

The developer, VANESA KRIZANIC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • VANESA KRIZANIC
    Size
    • 1.5 MB
    Category
    • Games
    Compatibility
    Requires iOS 15.6 or later.
    • iPhone
      Requires iOS 15.6 or later.
    • iPod touch
      Requires iOS 15.6 or later.
    • Mac
      Requires macOS 12.5 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © Cipher Post, 2026. All rights reserved.
  • Privacy Policy